On 15/03/2021 18:25, Ricardo Ribalda wrote:
> Setting a control while inactive is meant to work, but it might
> not be actually written to the hardware until control becomes active.
>
> v4l2-compliance should allow -EACCES as an error code, but only for
> the uvcdriver when an attempt is made to set inactive controls.
>
> The control framework is able to handle this case more elegantly:
> it will remember the last set inactive value, and when the control
> becomes active it will update the hardware. But that's really hard
> to model in uvc.
>
> Suggested-by: Hans Verkuil <hverkuil@xxxxxxxxx>
> Signed-off-by: Ricardo Ribalda <ricardo@xxxxxxxxxxx>
> ---
> utils/v4l2-compliance/v4l2-compliance.cpp | 2 ++
> utils/v4l2-compliance/v4l2-compliance.h | 1 +
> utils/v4l2-compliance/v4l2-test-controls.cpp | 21 +++++++++++++++-----
> 3 files changed, 19 insertions(+), 5 deletions(-)
>
> diff --git a/utils/v4l2-compliance/v4l2-compliance.cpp b/utils/v4l2-compliance/v4l2-compliance.cpp
> index 9f71332c..1c21197b 100644
> --- a/utils/v4l2-compliance/v4l2-compliance.cpp
> +++ b/utils/v4l2-compliance/v4l2-compliance.cpp
> @@ -84,6 +84,7 @@ bool show_colors;
> bool exit_on_fail;
> bool exit_on_warn;
> bool is_vivid;
> +bool is_uvcvideo;
> int media_fd = -1;
> unsigned warnings;
>
> @@ -958,6 +959,7 @@ void testNode(struct node &node, struct node &node_m2m_cap, struct node &expbuf_
> if (node.is_v4l2()) {
> doioctl(&node, VIDIOC_QUERYCAP, &vcap);
> driver = reinterpret_cast<const char *>(vcap.driver);
> + is_uvcvideo = driver == "uvcvideo";
> is_vivid = driver == "vivid";
> if (is_vivid)
> node.bus_info = reinterpret_cast<const char *>(vcap.bus_info);
> diff --git a/utils/v4l2-compliance/v4l2-compliance.h b/utils/v4l2-compliance/v4l2-compliance.h
> index 4d5c3a5c..db4790a6 100644
> --- a/utils/v4l2-compliance/v4l2-compliance.h
> +++ b/utils/v4l2-compliance/v4l2-compliance.h
> @@ -50,6 +50,7 @@ extern bool no_progress;
> extern bool exit_on_fail;
> extern bool exit_on_warn;
> extern bool is_vivid; // We're testing the vivid driver
> +extern bool is_uvcvideo; // We're testing the uvc driver
> extern int kernel_version;
> extern int media_fd;
> extern unsigned warnings;
> diff --git a/utils/v4l2-compliance/v4l2-test-controls.cpp b/utils/v4l2-compliance/v4l2-test-controls.cpp
> index 4be2f61c..70a8353a 100644
> --- a/utils/v4l2-compliance/v4l2-test-controls.cpp
> +++ b/utils/v4l2-compliance/v4l2-test-controls.cpp
> @@ -485,6 +485,8 @@ int testSimpleControls(struct node *node)
> } else if (ret == EILSEQ) {
> warn("s_ctrl returned EILSEQ\n");
> ret = 0;
> + } else if (ret == EACCES && is_uvcvideo) {
> + ret = 0;
> } else if (ret) {
> return fail("s_ctrl returned an error (%d)\n", ret);
> }
> @@ -498,7 +500,8 @@ int testSimpleControls(struct node *node)
> ctrl.id = qctrl.id;
> ctrl.value = qctrl.minimum - 1;
> ret = doioctl(node, VIDIOC_S_CTRL, &ctrl);
> - if (ret && ret != EIO && ret != EILSEQ && ret != ERANGE)
> + if (ret && ret != EIO && ret != EILSEQ && ret != ERANGE &&
> + !(ret == EACCES && is_uvcvideo))
> return fail("invalid minimum range check\n");
> if (!ret && checkSimpleCtrl(ctrl, qctrl))
> return fail("invalid control %08x\n", qctrl.id);
> @@ -508,7 +511,8 @@ int testSimpleControls(struct node *node)
> ctrl.id = qctrl.id;
> ctrl.value = qctrl.maximum + 1;
> ret = doioctl(node, VIDIOC_S_CTRL, &ctrl);
> - if (ret && ret != EIO && ret != EILSEQ && ret != ERANGE)
> + if (ret && ret != EIO && ret != EILSEQ && ret != ERANGE &&
> + !(ret == EACCES && is_uvcvideo))
> return fail("invalid maximum range check\n");
> if (!ret && checkSimpleCtrl(ctrl, qctrl))
> return fail("invalid control %08x\n", qctrl.id);
For the 'if (qctrl.step > 1 && qctrl.maximum > qctrl.minimum) {' section an
EACCES check is also needed (it fails there for my Logitech webcam).
The same is true for the 'if (qctrl.type == V4L2_CTRL_TYPE_MENU || qctrl.type == V4L2_CTRL_TYPE_INTEGER_MENU) {'
section. Unfortunately, I don't have a uvc webcam that has an inactive menu.
Regards,
Hans
> @@ -551,15 +555,18 @@ int testSimpleControls(struct node *node)
> ctrl.id = qctrl.id;
> ctrl.value = qctrl.minimum;
> ret = doioctl(node, VIDIOC_S_CTRL, &ctrl);
> - if (ret && ret != EIO && ret != EILSEQ)
> + if (ret && ret != EIO && ret != EILSEQ &&
> + !(ret == EACCES && is_uvcvideo))
> return fail("could not set minimum value\n");
> ctrl.value = qctrl.maximum;
> ret = doioctl(node, VIDIOC_S_CTRL, &ctrl);
> - if (ret && ret != EIO && ret != EILSEQ)
> + if (ret && ret != EIO && ret != EILSEQ &&
> + !(ret == EACCES && is_uvcvideo))
> return fail("could not set maximum value\n");
> ctrl.value = qctrl.default_value;
> ret = doioctl(node, VIDIOC_S_CTRL, &ctrl);
> - if (ret && ret != EIO && ret != EILSEQ)
> + if (ret && ret != EIO && ret != EILSEQ &&
> + !(ret == EACCES && is_uvcvideo))
> return fail("could not set default value\n");
> }
> }
> @@ -731,6 +738,8 @@ int testExtendedControls(struct node *node)
> } else if (ret == EILSEQ) {
> warn("s_ext_ctrls returned EILSEQ\n");
> ret = 0;
> + } else if (ret == EACCES && is_uvcvideo) {
> + ret = 0;
> }
> if (ret)
> return fail("s_ext_ctrls returned an error (%d)\n", ret);
> @@ -806,6 +815,8 @@ int testExtendedControls(struct node *node)
> } else if (ret == EILSEQ) {
> warn("s_ext_ctrls returned EILSEQ\n");
> ret = 0;
> + } else if (ret == EACCES && is_uvcvideo) {
> + ret = 0;
> }
> if (ret)
> return fail("could not set all controls\n");
>
